Study of the Influence of a Coagulant on the Operation of a Self-Renewing Suspended Layer of an Airlift Bioreactor During Coprecipitation of Phosphorus Compounds
Yu. V. Vasilyeva
FSBEI HE «Donbas National Academy of Civil Engineering and Architecture»
Abstract: The paper presents the results of a study of the operation of a self-renewing suspended layer of activated sludge when introducing a coagulant into an airlift bioreactor. The results of semi-industrial studies of the sludge separation process during reagent coprecipitation of phosphorus compounds in an airlift bioreactor are presented. The dependence of the introduction of a coagulant on the effectiveness of clarification was studied. It has been established that adding a coagulant directly to the bioreactor increases the efficiency of clarification of sludge water in the suspended layer by 10–40 %, depending on the dose of the coagulant. As the coagulant dose increases, a predicted increase in the degree of phosphorus removal is observed. The values of the coprecipitation coefficient are proposed to describe the self-renewing suspended layer of activated sludge in airlift bioreactors. The dependence of the coprecipitation coefficient on the load on the mirror of the protective zone of the clarifier is insignificant, therefore it is considered as a function of the coagulant dose. To describe the dependence of the coprecipitation coefficient on the coagulant dose, a power function was chosen. It has been experimentally established that with increasing dose of coagulant, the coprecipitation coefficient decreases.
Keywords: coprecipitation, coagulant, phosphorus, activated sludge, load, clarification, reagent methods of phosphorus removing.
Pages: 109-114.
Link for citation: Vasilyeva, Yu. V. Study of the Influence of a Coagulant on the Operation of a Self-Renewing Suspended Layer of an Airlift Bioreactor During Coprecipitation of Phosphorus Compounds. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2024. – Issue 2024-4(168) Scientific and technical achievements of students of the construction and architectural industry. – Р. 109-114. – URL: https://donnasa.ru/publish_house/journals/vestnik/2024/2024-4(168)/st_23_vasilyeva.pdf (date of access: 15.10.2024). (in Russian)
Issue 2024-4 (168)Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture